  public function unlike($Id,$ansID)                                  Class layer
   { 
      $Query ="DELETE FROM project.likes WHERE  likes.student_ID=".$Id." AND  likes.answers_ID='$ansID' ";
   
   
  $requery=mysql_query($Query) or die("not deleted");
   }

________________________________________________________________________________________________
$like->unlike($like->Id,$like->ansID);
$sid=$_POST['studentid'];                                    Logic LAyer
$qid=$_POST['quesid'];